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Unformatted text preview: This document consists of 10 printed pages and 2 blank pages. SPA (SJF3730) T02141/3 UCLES 2006 [Turn over UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level CHEMISTRY 9701/04 Paper 4 Structured Questions A2 Core October/November 2006 1 hour 15 minutes Candidates answer on the Question Paper. Additional Materials: Data Booklet READ THESE INSTRUCTIONS FIRST Write your name, Centre number and candidate number in the spaces at the top of this page. Write in dark blue or black pen. You may use a pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Answer all questions. You may lose marks if you do not show your working or if you do not use appropriate units. A Data Booklet is provided. The number of marks is given in brackets [ ] at the end of each question or part question. At the end of the examination, fasten all your work securely together. Centre Number Candidate Number Name For Examiners Use 1 2 3 4 5 Total 2 9701/04/O/N/06 1 (a) Describe and explain how the boiling points of the tetrachlorides of the Group IV elements vary down the group. .......................................................................................................................................... .......................................................................................................................................... .......................................................................................................................................... ..................................................................................................................................... [3] (b) The tetrachlorides are all covalent compounds. Draw a diagram showing the shape of a molecule of silicon tetrachloride, including values for bond angles. [2] (c) The noble gas xenon forms a tetrafluoride, XeF 4 . Only four of xenons outer shell electrons are used in bonding to the fluorine atoms. (i) Draw a dot-and-cross diagram showing how the outer-shell electrons are arranged in XeF 4 . (ii) Predict the shape and the bond angles in XeF 4 . ................................................................................................................................... ................................................................................................................................... [4] (d) Describe and explain how the reactions of CC l 4 and SiC l 4 with water differ. Write an equation for any reaction that occurs. .............................................................................................................................................
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